The phrase "are efficient devices for" is correct and usable in written English.
It can be used when describing tools or mechanisms that perform tasks effectively or with minimal waste.
Example: "Solar panels are efficient devices for converting sunlight into electricity."
Alternatives: "are effective tools for" or "serve as productive means for".
Heat pipes are efficient heat transfer devices for solar hot water heating systems.
An all earth-abundant and precious metal-free photocathode based on a low-temperature fabricated amorphous silicon tandem junction is demonstrated to be an efficient device for solar water splitting.
Solid oxide fuel cells (SOFCs) are the most efficient devices for the direct conversion of the chemical energy stored in fuels such as hydrogen and hydrocarbons into electricity.
This throwback is an efficient device for making pressed grilled sandwiches that some people may remember from decades ago, just as Janice Feigenbaum and her sister, Susan Caldwell, do.
Devices with RHP are efficient and perspective for the heating, concentrating, drying the foodstuffs.
The results indicate that, though in the present study the spinning-disc impeller is found to be a less efficient device for bubble break up than a standard Rushton turbine, this could be rectified through a different selection of spinning-disc dimensions and operating conditions.
My test car, bright red with a gray leather interior, could be one of the most efficient devices for collecting traffic tickets that Mercedes has ever brought to market.
The described MQW device concept may be useful to fabricate highly efficient devices for future OLED display and lighting applications.
Wall-flow filters are worldwide recognized as the most efficient devices for the abatement of particulate emissions from automotive diesel engines.
While this is definitely an efficient device for trapping cells, the mechanism of cell capture relying purely on size effects is still questionable.
